Awesome photo of the test bird. Boeing will throw anything that they might want to test on it. The sad part is that many of the mod's they try will never see day light on an operational bird. The thing that will catch your eye in this photo is one good example of this. This is not part of 40-45. To be honest, I don't believe they actually intended to even install this mod on an E-3, but rather another 707 airframe.

It would have been cool, but unless something drastically changes, this will be the first and last time this mod will be installed.